CVE-2018-4267

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-05-14. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

Multiple memory corruption issues were addressed with improved memory handling. This issue affected versions prior to iOS 11.4.1, tvOS 11.4.1, Safari 11.1.2, iTunes 12.8 for Windows, iCloud for Windows 7.6.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
79%
KEV
Not listed

Published

April 3, 2019

Last Modified

November 21, 2024

Advisory Details (5)

Auto-updated Aug 2, 2026
No patch confirmed yet.
generic

About the security content of iOS 11.4.1 - Apple Support

https://support.apple.com/kb/HT208938
generic

About the security content of tvOS 11.4.1 - Apple Support

https://support.apple.com/kb/HT208936
generic

About the security content of Safari 11.1.2 - Apple Support

https://support.apple.com/kb/HT208934
generic

About the security content of iTunes 12.8 for Windows - Apple Support

https://support.apple.com/kb/HT208933
generic

About the security content of iCloud for Windows 7.6 - Apple Support

https://support.apple.com/kb/HT208932

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibwebkit2gtk-4.0-doc (2.20.5-0ubuntu0.16.04.1) @ xenial2026-05-27ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
webkit2gtk—2.20.4-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
webkit2gtk—2.20.4-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
webkit2gtk—2.20.4-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
webkit2gtk—2.20.4-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 31× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 126 total refreshes for this CVE.

  1. 2026-08-20 22:51 UTCEPSS rescore
  2. 2026-08-19 17:00 UTCEPSS rescore
  3. 2026-08-18 13:44 UTCEPSS rescore
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  11. 2026-08-07 16:23 UTCEPSS rescore
  12. 2026-08-06 13:42 UTCEPSS rescore
  13. 2026-08-06 05:51 UTCOSV refresh
  14. 2026-08-04 15:05 UTCEPSS rescore
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  1. 2026-07-24 14:14 UTCEPSS rescore
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  5. 2026-07-23 01:36 UTCEG score recompute
  6. 2026-07-22 22:16 UTCEG score recompute
  7. 2026-07-22 14:05 UTCEPSS rescore
  8. 2026-07-21 15:22 UTCEPSS rescore
  9. 2026-07-20 19:02 UTCOSV refresh
  10. 2026-07-20 17:04 UTCEPSS rescore
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  12. 2026-07-19 14:28 UTCEPSS rescore
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  18. 2026-07-15 16:55 UTCEPSS rescore
  19. 2026-07-15 01:56 UTCEPSS rescore
  20. 2026-07-13 22:27 UTCEPSS rescore
  21. 2026-07-13 06:10 UTCEPSS rescore
  22. 2026-07-12 05:43 UTCEPSS rescore
  23. 2026-07-09 19:06 UTCEPSS rescore
  24. 2026-07-08 15:11 UTCEPSS rescore
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  26. 2026-07-07 13:42 UTCEPSS rescore
  27. 2026-07-07 13:42 UTCEPSS rescore
  28. 2026-07-06 16:25 UTCEPSS rescore
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  34. 2026-07-03 14:26 UTCOSV refresh
  35. 2026-07-01 15:03 UTCEPSS rescore
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  37. 2026-06-30 23:20 UTCEPSS rescore
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  39. 2026-06-28 14:04 UTCEPSS rescore
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  42. 2026-06-27 03:06 UTCEPSS rescore
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  44. 2026-06-25 13:47 UTCEPSS rescore
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  48. 2026-06-23 21:30 UTCEPSS rescore
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  58. 2026-06-18 17:50 UTCEPSS rescore
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  60. 2026-06-17 17:50 UTCEPSS rescore
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  63. 2026-06-15 17:45 UTCEPSS rescore
  64. 2026-06-15 04:13 UTCOSV refresh
  65. 2026-06-14 23:15 UTCEPSS rescore
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  67. 2026-06-13 22:58 UTCEPSS rescore
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  73. 2026-06-08 14:14 UTCEPSS rescore
  74. 2026-06-07 15:22 UTCEPSS rescore
  75. 2026-06-07 15:22 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2018-4267?
CVE-2018-4267 is a high vulnerability published on April 3, 2019. Multiple memory corruption issues were addressed with improved memory handling. This issue affected versions prior to iOS 11.4.1, tvOS 11.4.1, Safari 11.1.2, iTunes 12.8 for Windows, iCloud for Windows 7.6.
When was CVE-2018-4267 disclosed?
CVE-2018-4267 was first published in the National Vulnerability Database on April 3, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2018-4267 actively exploited?
CVE-2018-4267 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 21.1% of all scored CVEs.
What is the CVSS score of CVE-2018-4267?
CVE-2018-4267 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2018-4267?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-4267, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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